How do I create 7-Zip archives with NET

Question

How can I create 7-Zip archives from my C  console application  I need to be able to extract the archives using the regular  widely available 7-Zip program     Here are my results with the examples provided as answers to this question    Shelling out  to 7z exe - this is the simplest and most effective approach  and I can confirm that it works nicely  As workmad3 mentions  I just need to guarantee that 7z exe is installed on all target machines  which is something I can guarantee  7Zip in memory compression - this refers to compressing cookies  in-memory  before sending to the client  this method seems somewhat promising  The wrapper methods  wrapping the LZMA SDK  return type byte    When I write the byte   array to a file  I can t extract it using 7-Zip  File 7z is not supported archive   7zSharp Wrapper  found on CodePlex  - this wraps the 7z exe LZMA SDK  I referenced the project from my app  and it successfully created some archive files  but I was unable to extract the files using the regular 7-Zip program  File 7z is not supported archive   7Zip SDK aka LZMA SDK - I guess I m not smart enough to figure out how to use this  which is why I posted here     Any working code examples that demonstrate creating a 7zip archive that is able to be extracted by the regular 7zip program  CodeProject C    NET  Interface for 7-Zip Archive DLLs - only supports extracting from 7zip archives    I need to create them  SharpZipLib - According to their FAQ  SharpZipLib doesn t support 7zip

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Some additional test-info on  Orwellophile code using a 17 9MB textfile  Using the property values in the code-example  as is  will have a HUGE negative impact on performance  it takes 14 16 sec   Setting the properties to the following do the same job at 3 91 sec  i a  the archive will have the same container info which is  you can extract and test the archive with 7zip but there are no filename information   Native 7zip 2 sec   CoderPropID   propIDs          CoderPropID DictionarySize      CoderPropID PosStateBits      CoderPropID LitContextBits      CoderPropID LitPosBits      CoderPropID Algorithm      CoderPropID NumFastBytes      CoderPropID MatchFinder    CoderPropID EndMarker    object   properties          Int32  dictionary        Int32  posStateBits        Int32  litContextBits        Int32  litPosBits        Int32  algorithm        Int32  numFastBytes       mf    eos      I did another test using native 7zip and a 1 2GB SQL backup file   bak  7zip  maximum compression   1 minute LZMA SDK   Orwellophile with above property-setting   12 26 min  -  Outputfile roughly same size   So I guess I ll myself will use a solution based on the c c   engine  i a  either call the 7zip executable from c  or use squid-box SevenZipSharp  which is a wrapper around the 7zip c c   dll file  and seems to be the newest fork of SevenZipSharp  Haven t tested the wrapper  but I hope is perform just as the native 7zip  But hopefully it will give the possibility to compress stream also which you obvious cannot if you call the exe directly  Otherwise I guess there isn t mush advantage over calling the exe  The wrapper have some additional dependencies so it will not make your published project  cleaner    By the way it seems the  Net Core team consider implementing LZMA in the system io class in  Core ver  5  that would be great    I know this is kind of a comment and not an answer but to be able to provide the code snippet it couldn t be a comment

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If you can guarantee the 7-zip app will be installed  and in the path  on all target machines  you can offload by calling the command line app 7z  Not the most elegant solution but it is the least work

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I use this code                   string PZipPath     C  Program Files 7-Zip 7z exe                   string sourceCompressDir     C  Test                   string targetCompressName     C  Test abc zip                   string CompressName   targetCompressName Split       Last                    string   fileCompressList   Directory GetFiles sourceCompressDir                               if  fileCompressList Length    0                                                MessageBox Show  No file in directory    Important Message                            return                                            string filetozip   null                      foreach  string filename in fileCompressList                                                filetozip   filetozip          filename                                                   ProcessStartInfo pCompress   new ProcessStartInfo                        pCompress FileName   PZipPath                      if  chkRequestPWD Checked    true                                                pCompress Arguments    a -tzip       targetCompressName           filetozip     -mx 9      -p    tbPassword Text                                            else                                               pCompress Arguments    a -tzip       targetCompressName             filetozip       -mx 9                                             pCompress WindowStyle   ProcessWindowStyle Hidden                      Process x   Process Start pCompress                       x WaitForExit

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I used the sdk    eg   using SevenZip Compression LZMA  private static void CompressFileLZMA string inFile  string outFile       SevenZip Compression LZMA Encoder coder   new SevenZip Compression LZMA Encoder        using  FileStream input   new FileStream inFile  FileMode Open              using  FileStream output   new FileStream outFile  FileMode Create                     coder Code input  output  -1  -1  null             output Flush

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string zipfile     E  Folderx NPPES zip    string folder     E  TargetFolderx     ExtractFile zipfile folder   public void ExtractFile string source  string destination                           If the directory doesn t exist  create it              if   Directory Exists destination                   Directory CreateDirectory destination                  string zPath   ConfigurationManager AppSettings  FileExtactorEXE                  string zPath   Properties Settings Default FileExtactorEXE                 string zPath   C  Program Files 7-Zip 7zG exe                try                               ProcessStartInfo pro   new ProcessStartInfo                    pro WindowStyle   ProcessWindowStyle Hidden                  pro FileName   zPath                  pro Arguments    x       source       -o    destination                  Process x   Process Start pro                   x WaitForExit                              catch  System Exception Ex                  Just Install 7 zip from source and pass the parameter to the method   Thanks  Please like the answer

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Install the NuGet package called SevenZipSharp Interop  Then   SevenZipBase SetLibraryPath     x86 7z dll    var compressor   new SevenZip SevenZipCompressor    var filesToCompress   Directory GetFiles   D  data     compressor CompressFiles   C  archive abc 7z   filesToCompress

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SevenZipSharp is another solution  Creates 7-zip archives

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Here s a complete working example using the SevenZip SDK in C       It will write  and read  standard 7zip files as created by the Windows 7zip application     PS  The previous example was never going to decompress because it never wrote the required property information to the start of the file   using System  using System Collections Generic  using System Linq  using System Text  using SevenZip Compression LZMA  using System IO  using SevenZip   namespace VHD Director       class My7Zip               public static void CompressFileLZMA string inFile  string outFile                        Int32 dictionary   1  lt  lt  23              Int32 posStateBits   2              Int32 litContextBits   3     for normal files                UInt32 litContextBits   0     for 32-bit data             Int32 litPosBits   0                 UInt32 litPosBits   2     for 32-bit data             Int32 algorithm   2              Int32 numFastBytes   128               string mf    bt4               bool eos   true              bool stdInMode   false                CoderPropID   propIDs                      CoderPropID DictionarySize                  CoderPropID PosStateBits                  CoderPropID LitContextBits                  CoderPropID LitPosBits                  CoderPropID Algorithm                  CoderPropID NumFastBytes                  CoderPropID MatchFinder                  CoderPropID EndMarker                             object   properties                      Int32  dictionary                    Int32  posStateBits                    Int32  litContextBits                    Int32  litPosBits                    Int32  algorithm                    Int32  numFastBytes                   mf                  eos                             using  FileStream inStream   new FileStream inFile  FileMode Open                                 using  FileStream outStream   new FileStream outFile  FileMode Create                                         SevenZip Compression LZMA Encoder encoder   new SevenZip Compression LZMA Encoder                        encoder SetCoderProperties propIDs  properties                       encoder WriteCoderProperties outStream                       Int64 fileSize                      if  eos    stdInMode                          fileSize   -1                      else                         fileSize   inStream Length                      for  int i   0  i  lt  8  i                            outStream WriteByte  Byte  fileSize  gt  gt   8   i                         encoder Code inStream  outStream  -1  -1  null                                                       public static void DecompressFileLZMA string inFile  string outFile                        using  FileStream input   new FileStream inFile  FileMode Open                                 using  FileStream output   new FileStream outFile  FileMode Create                                         SevenZip Compression LZMA Decoder decoder   new SevenZip Compression LZMA Decoder                         byte   properties   new byte 5                       if  input Read properties  0  5     5                          throw  new Exception  input  lzma is too short                         decoder SetDecoderProperties properties                        long outSize   0                      for  int i   0  i  lt  8  i                                                  int v   input ReadByte                            if  v  lt  0                              throw  new Exception  Can t Read 1                             outSize      long  byte v   lt  lt   8   i                                             long compressedSize   input Length - input Position                       decoder Code input  output  compressedSize  outSize  null                                                      public static void Test                         CompressFileLZMA  DiscUtils pdb    DiscUtils pdb 7z                DecompressFileLZMA  DiscUtils pdb 7z    DiscUtils pdb2

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EggCafe 7Zip cookie example This is an example  zipping cookie  with the DLL of 7Zip   CodePlex Wrapper This is an open source project that warp zipping function of 7z   7Zip SDK The official SDK for 7zip  C  C    C   Java   lt ---My suggestion   Net zip library by SharpDevelop net  CodeProject example with 7zip  SharpZipLib Many zipping

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EggCafe 7Zip cookie example This is an example  zipping cookie  with the DLL of 7Zip   CodePlex Wrapper This is an open source project that warp zipping function of 7z   7Zip SDK The official SDK for 7zip  C  C    C   Java   lt ---My suggestion   Net zip library by SharpDevelop net  CodeProject example with 7zip  SharpZipLib Many zipping

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SevenZipSharp is another solution  Creates 7-zip archives

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If you can guarantee the 7-zip app will be installed  and in the path  on all target machines  you can offload by calling the command line app 7z  Not the most elegant solution but it is the least work

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Here s a complete working example using the SevenZip SDK in C       It will write  and read  standard 7zip files as created by the Windows 7zip application     PS  The previous example was never going to decompress because it never wrote the required property information to the start of the file   using System  using System Collections Generic  using System Linq  using System Text  using SevenZip Compression LZMA  using System IO  using SevenZip   namespace VHD Director       class My7Zip               public static void CompressFileLZMA string inFile  string outFile                        Int32 dictionary   1  lt  lt  23              Int32 posStateBits   2              Int32 litContextBits   3     for normal files                UInt32 litContextBits   0     for 32-bit data             Int32 litPosBits   0                 UInt32 litPosBits   2     for 32-bit data             Int32 algorithm   2              Int32 numFastBytes   128               string mf    bt4               bool eos   true              bool stdInMode   false                CoderPropID   propIDs                      CoderPropID DictionarySize                  CoderPropID PosStateBits                  CoderPropID LitContextBits                  CoderPropID LitPosBits                  CoderPropID Algorithm                  CoderPropID NumFastBytes                  CoderPropID MatchFinder                  CoderPropID EndMarker                             object   properties                      Int32  dictionary                    Int32  posStateBits                    Int32  litContextBits                    Int32  litPosBits                    Int32  algorithm                    Int32  numFastBytes                   mf                  eos                             using  FileStream inStream   new FileStream inFile  FileMode Open                                 using  FileStream outStream   new FileStream outFile  FileMode Create                                         SevenZip Compression LZMA Encoder encoder   new SevenZip Compression LZMA Encoder                        encoder SetCoderProperties propIDs  properties                       encoder WriteCoderProperties outStream                       Int64 fileSize                      if  eos    stdInMode                          fileSize   -1                      else                         fileSize   inStream Length                      for  int i   0  i  lt  8  i                            outStream WriteByte  Byte  fileSize  gt  gt   8   i                         encoder Code inStream  outStream  -1  -1  null                                                       public static void DecompressFileLZMA string inFile  string outFile                        using  FileStream input   new FileStream inFile  FileMode Open                                 using  FileStream output   new FileStream outFile  FileMode Create                                         SevenZip Compression LZMA Decoder decoder   new SevenZip Compression LZMA Decoder                         byte   properties   new byte 5                       if  input Read properties  0  5     5                          throw  new Exception  input  lzma is too short                         decoder SetDecoderProperties properties                        long outSize   0                      for  int i   0  i  lt  8  i                                                  int v   input ReadByte                            if  v  lt  0                              throw  new Exception  Can t Read 1                             outSize      long  byte v   lt  lt   8   i                                             long compressedSize   input Length - input Position                       decoder Code input  output  compressedSize  outSize  null                                                      public static void Test                         CompressFileLZMA  DiscUtils pdb    DiscUtils pdb 7z                DecompressFileLZMA  DiscUtils pdb 7z    DiscUtils pdb2

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I used the sdk    eg   using SevenZip Compression LZMA  private static void CompressFileLZMA string inFile  string outFile       SevenZip Compression LZMA Encoder coder   new SevenZip Compression LZMA Encoder        using  FileStream input   new FileStream inFile  FileMode Open              using  FileStream output   new FileStream outFile  FileMode Create                     coder Code input  output  -1  -1  null             output Flush

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I used the sdk    eg   using SevenZip Compression LZMA  private static void CompressFileLZMA string inFile  string outFile       SevenZip Compression LZMA Encoder coder   new SevenZip Compression LZMA Encoder        using  FileStream input   new FileStream inFile  FileMode Open              using  FileStream output   new FileStream outFile  FileMode Create                     coder Code input  output  -1  -1  null             output Flush

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EggCafe 7Zip cookie example This is an example  zipping cookie  with the DLL of 7Zip   CodePlex Wrapper This is an open source project that warp zipping function of 7z   7Zip SDK The official SDK for 7zip  C  C    C   Java   lt ---My suggestion   Net zip library by SharpDevelop net  CodeProject example with 7zip  SharpZipLib Many zipping

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I use this code                   string PZipPath     C  Program Files 7-Zip 7z exe                   string sourceCompressDir     C  Test                   string targetCompressName     C  Test abc zip                   string CompressName   targetCompressName Split       Last                    string   fileCompressList   Directory GetFiles sourceCompressDir                               if  fileCompressList Length    0                                                MessageBox Show  No file in directory    Important Message                            return                                            string filetozip   null                      foreach  string filename in fileCompressList                                                filetozip   filetozip          filename                                                   ProcessStartInfo pCompress   new ProcessStartInfo                        pCompress FileName   PZipPath                      if  chkRequestPWD Checked    true                                                pCompress Arguments    a -tzip       targetCompressName           filetozip     -mx 9      -p    tbPassword Text                                            else                                               pCompress Arguments    a -tzip       targetCompressName             filetozip       -mx 9                                             pCompress WindowStyle   ProcessWindowStyle Hidden                      Process x   Process Start pCompress                       x WaitForExit

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If you can guarantee the 7-zip app will be installed  and in the path  on all target machines  you can offload by calling the command line app 7z  Not the most elegant solution but it is the least work

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I used the sdk    eg   using SevenZip Compression LZMA  private static void CompressFileLZMA string inFile  string outFile       SevenZip Compression LZMA Encoder coder   new SevenZip Compression LZMA Encoder        using  FileStream input   new FileStream inFile  FileMode Open              using  FileStream output   new FileStream outFile  FileMode Create                     coder Code input  output  -1  -1  null             output Flush

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SharpCompress is in my opinion one of the smartest compression libraries out there  It supports LZMA  7-zip   is easy to use and under active development   As it has LZMA streaming support already  at the time of writing it unfortunately only supports 7-zip archive reading  BUT archive writing is on their todo list  see readme   For future readers  Check to get the current status here  https   github com adamhathcock sharpcompress blob master FORMATS md

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string zipfile     E  Folderx NPPES zip    string folder     E  TargetFolderx     ExtractFile zipfile folder   public void ExtractFile string source  string destination                           If the directory doesn t exist  create it              if   Directory Exists destination                   Directory CreateDirectory destination                  string zPath   ConfigurationManager AppSettings  FileExtactorEXE                  string zPath   Properties Settings Default FileExtactorEXE                 string zPath   C  Program Files 7-Zip 7zG exe                try                               ProcessStartInfo pro   new ProcessStartInfo                    pro WindowStyle   ProcessWindowStyle Hidden                  pro FileName   zPath                  pro Arguments    x       source       -o    destination                  Process x   Process Start pro                   x WaitForExit                              catch  System Exception Ex                  Just Install 7 zip from source and pass the parameter to the method   Thanks  Please like the answer

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SharpCompress is in my opinion one of the smartest compression libraries out there  It supports LZMA  7-zip   is easy to use and under active development   As it has LZMA streaming support already  at the time of writing it unfortunately only supports 7-zip archive reading  BUT archive writing is on their todo list  see readme   For future readers  Check to get the current status here  https   github com adamhathcock sharpcompress blob master FORMATS md

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These easiest way is to work with  zip files instead of  7z and use Dot Net Zip  When spinning off 7zip commands to shell there are other issues like user privileges  I had issue with SevenZipSharp   Private Function CompressFile filename As String  As Boolean Using zip As New ZipFile       zip AddFile filename  amp    txt           zip Save filename  amp    zip   End Using  Return File Exists filename  amp    zip   End Function

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EggCafe 7Zip cookie example This is an example  zipping cookie  with the DLL of 7Zip   CodePlex Wrapper This is an open source project that warp zipping function of 7z   7Zip SDK The official SDK for 7zip  C  C    C   Java   lt ---My suggestion   Net zip library by SharpDevelop net  CodeProject example with 7zip  SharpZipLib Many zipping

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These easiest way is to work with  zip files instead of  7z and use Dot Net Zip  When spinning off 7zip commands to shell there are other issues like user privileges  I had issue with SevenZipSharp   Private Function CompressFile filename As String  As Boolean Using zip As New ZipFile       zip AddFile filename  amp    txt           zip Save filename  amp    zip   End Using  Return File Exists filename  amp    zip   End Function

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Install the NuGet package called SevenZipSharp Interop  Then   SevenZipBase SetLibraryPath     x86 7z dll    var compressor   new SevenZip SevenZipCompressor    var filesToCompress   Directory GetFiles   D  data     compressor CompressFiles   C  archive abc 7z   filesToCompress

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Some additional test-info on  Orwellophile code using a 17 9MB textfile  Using the property values in the code-example  as is  will have a HUGE negative impact on performance  it takes 14 16 sec   Setting the properties to the following do the same job at 3 91 sec  i a  the archive will have the same container info which is  you can extract and test the archive with 7zip but there are no filename information   Native 7zip 2 sec   CoderPropID   propIDs          CoderPropID DictionarySize      CoderPropID PosStateBits      CoderPropID LitContextBits      CoderPropID LitPosBits      CoderPropID Algorithm      CoderPropID NumFastBytes      CoderPropID MatchFinder    CoderPropID EndMarker    object   properties          Int32  dictionary        Int32  posStateBits        Int32  litContextBits        Int32  litPosBits        Int32  algorithm        Int32  numFastBytes       mf    eos      I did another test using native 7zip and a 1 2GB SQL backup file   bak  7zip  maximum compression   1 minute LZMA SDK   Orwellophile with above property-setting   12 26 min  -  Outputfile roughly same size   So I guess I ll myself will use a solution based on the c c   engine  i a  either call the 7zip executable from c  or use squid-box SevenZipSharp  which is a wrapper around the 7zip c c   dll file  and seems to be the newest fork of SevenZipSharp  Haven t tested the wrapper  but I hope is perform just as the native 7zip  But hopefully it will give the possibility to compress stream also which you obvious cannot if you call the exe directly  Otherwise I guess there isn t mush advantage over calling the exe  The wrapper have some additional dependencies so it will not make your published project  cleaner    By the way it seems the  Net Core team consider implementing LZMA in the system io class in  Core ver  5  that would be great    I know this is kind of a comment and not an answer but to be able to provide the code snippet it couldn t be a comment

User · Answer

If you can guarantee the 7-zip app will be installed  and in the path  on all target machines  you can offload by calling the command line app 7z  Not the most elegant solution but it is the least work

[c#] How do I create 7-Zip archives with .NET?

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